JPS63127205U

JPS63127205U -

Info

Publication number: JPS63127205U
Application number: JP1829087U
Authority: JP
Priority date: 1987-02-10
Filing date: 1987-02-10
Publication date: 1988-08-19

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例による放圧装置を
示す斜視図、第２図は垂直曲げした回転支点端部
を有する放圧カバーの斜視図、第３図はこの考案
の回転支点部の詳細図、第４図は回転開放時の動
作を示す図、第５図は従来例を示す斜視図である
。図に於いて、１は外箱、２は放圧装置、３は放
圧カバー、５は開口、６は垂直曲げ回転支点端部
、６ｂは回転角抑止用の切欠き、７はＬ字形金具
である。なお、図中、同一符号は同一、又は相当
部分を示す。 Fig. 1 is a perspective view showing a pressure relief device according to an embodiment of the invention, Fig. 2 is a perspective view of a pressure relief cover having a vertically bent rotation fulcrum end, and Fig. 3 is a perspective view of the rotation fulcrum part of the invention. A detailed view, FIG. 4 is a diagram showing the operation when the rotation is opened, and FIG. 5 is a perspective view showing a conventional example. In the figure, 1 is the outer box, 2 is the pressure relief device, 3 is the pressure relief cover, 5 is the opening, 6 is the end of the vertical bending rotation fulcrum, 6b is the notch for suppressing the rotation angle, and 7 is the L-shaped metal fitting. It is. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims

[Scope of utility model registration request]

A closed power distribution board having an opening in the upper part of the closed power distribution board box body, and having a pressure relief device that normally closes this opening with a cover and opens the cover by the internal pressure when the internal pressure of the box body increases, the cover and a reinforcing member provided on two mutually opposing sides of the cover, the reinforcing member having a surface substantially orthogonal to the opening closing surface, and the orthogonal surface extending and protruding from the upper surface of the cover to the side; and a support member that rotatably supports a position closer to the cover by a predetermined distance from the protruding end, and when the cover is operated, one end of the reinforcing member comes into contact with the box body and rotates by a predetermined angle or more. Pressure relief device for a closed switchboard, characterized by blocking.